Apparatus for clearing and filtering waste water.



To all whom it may concern:

" UN STATES PATENT ()FFICE.

* -FRANZ SCHNEIDER, OF SCHWARZENBERG, GERMANY.

APPARATUS FOR CLEARING AND'FILTERING WASTE WATER.

Specification of Letters Patent.

' Application filed March 25, 1910. .Serial No. 551,510.

Be it known that. LFnANz SCHNEIDER, a subject of the King of Saxony,residing at Schwarzenber in the Kingdom of Saxony and German Empire,have invented a new and useful Improved Apparatus for Clearing andFiltering Waste Water, of which the following is a specification.

My invention relates to apparatus for clearing and filtering wastewater, adapted for use in paper mills and the like.

The apparatus heretofore used for the purpose have been of great servicein the manufacture of paper, butthey have certain drawbacks, which haveof late given oecasion for the introduction of other kinds of apparatus.These drawbacks consist in insufiicient purification of the waste water,insufficient store space for the water puritied, the necessity of usinga pump for raising the purified Water, and the formation of frothorfoam.

My invention has for object to overcome I these drawbacks'and itconsists, in improvements of the WiIStB'WiltGI supply pipe, as well asof the clearing and filtering apparatus, and, in the high constructionof .the latter.

In thei accompanying drawing: Figure 1 shows aivertical section of theapparatus, Fig. 2, a plan showing the strainer, Fig. 3, a section on theline A-B in Fig. 1., and Fig. 4, a vertical part section showing anotherconstru etionof the separator.

My new apparatus reaches from the ground up to a height in excess ofthat at which the fresh water cistern a is arranged and it comprises, inaddltion to the deposit tank 6, a Water tank 0, (I provided immediatelyabove, and having oneand a half to twice the height of, said deposittank. The

tank 0, d can, therefore, contain a large quantity of water, which,under normal conditions, is conducted into the tank a, but, in the caseof a disturbance, canbe conducted directly through the pipe 6 to themain f. The central tube is provided with a lid [L at the top, throughwhich passes the pipe i extending into the water in said tube y At thebottom end of said pipe 2' is provided a perforated plate is, in order,to lead in the Waste'water without its coming into contact .with theair, and to prevent the formation of foam. In the lid it there is asmall hole Z to enable the. air entering with the waste water to escape.To the central tube 9 is attached, instead of the funnel shapedseparator used in existing apparatus, a distributmg screen at, n, bywhich the waste water issuing at the bottom of the pipe g is caused tochange its direction and is distributed over a larger area, so that itsvelocity is decreased, until it reaches the edge 0 of'the funnel, thematter contained therein being thus caused to sink, while the waterrises in the tank 0, (1.

y In order toobtain a uniform distribution of the Waste water, and tobetter assure that the matter contained therein is deposited,distributing blades 7) are provided immediately under the screen m, n,said blades extending radially from the bottom endof the tube g to thewall of the tank b.

1 In orderto obtain a larger diameter and better action of the screen m.without having to make the tanks 1), 0, Z 'too large, the tank I) may belocally widened as shown at I), c in Fig. 4. The water rising in thetanks 0, (Z still contains minute and floating impurities, such aspieces, of wood, fibers, alga, etc. In order to retain these there isprovided around the overflow edge 9 of the tank (Z a filter consistingofan annular vessel 1",.s, in which are provided sieves t or the like(Fig. 1), which can be exchanged. The water must pass through thesesieves before leavin' the apparatus and it flows therefore perfectlypure into the cistern a.

What Iclaim and dcsire'to-secure by Letters Patent of the United Statesis 1. In apparatus for clearing and filtering Patented May 23, 1 911.

water, in combination, a reservoir for the filtered water, a compartmentfor the water to be filtered extending below said reservoir, a deposittank underneath of said compartment, a central. tube extending fromabove into the compartment, a lid closing said tube at the top, an airhole in said lid, a feed pipe within said central tube, a perforatedplate closing the bottom end of said' feed pipe, a distributing screenat the lower end of the central tube, adapted to change the direction ofthe waste water, distributing blades below said screen extendingradially'fro'm the bottom end of said tube to the wall of the deposittank, and exchangeable means to -s1-1b]cct said wa o a filteringprocess.

2. In apparatus for clearing .i filtering water, in combination, areservoir for the filtered water, a compartment for the water to befiltered extending below said reservoir,

a deposit tank underneath of said compartsel provided with exchangeablesieves at ment, a central tube extending from above v the top end of theapparatus above the reserintothe compartment, a lid closing said tubeatthe top, an air hole in said lid, a feed pipe Within said centraltube, a perforated plate closing the bottom end of said feed pipe, adistributing screen at the lower end of the central tube, adapted tochange the direction of the Waste Water, distributing blades below saidscreen extending radially from the bottom end of said tube to the all ofthe deposit tank, an annular vesvoir for the filtered Water, and meansto connect said compartment directly with the main pipe of a Waterconduit.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing Witnesses.

. FRANZ- SCHNEIDER. Witnesses:

ROBERT Amns NORTON, WM. WASHINGTON BRUNSWICK.

